Ton county



,- @uiten tstrs gamut @Hire Oris A. Terri?, or PLATTSBURO., AssieNOn TO JOSEPH Fanzine OF OLIN- TON COUNTY, New YORK.

Letras Patent No. 79,787, @zaad Juzg 7, 1868.

IMPROVEMENT IN SHARPNING SAWS.

TO ALL WHOM 1r MAY OONOERN;

Be it knowrr that I, OVTIS A. TE'FFLAofPlattshur'g, in the county of Clinton, and in the State o'f New York,

have invented certain new and useful Improvements in Machines for Grinding and Sharpening Saws; and do hereby declare that the following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of reference marked thereon. A 4

The nature of my invention consists in the combination of two frames,one oscillating upon trumnions, and the other adjustably connected to it, so that it may be partially rotated backwards and forwards, this latter frame being provided with a grindstone or polishing-wheel, for sharpening the teeth of and gumming saws, as will be hereinafter described: l I

In the annexed drawings," making part of thisspecication, A represents a base or platform, upon which the machine iserectcd. To this platform are secured the uprights C G. B represents a frame, which is provided with trnnnions at D D, and these trunnions have their bearings in the uprights G C. The frame oscillates upon these trnnnions. To one end of this frame is connected a-weight, S, and to the Vother end is secured a frame, G. Upon the frames B and Gare formed the enlargements H, and upon these enlargements, at their outer ends, arev formed the flanges or wheels a a. Abolt, I, passes through the enlargementsAH, for the purpose of securing the two frames together. The anges a aiit and bear against each other. The frame G, it will now be seen,

has `two movements, Vone with frame B, when it oscillates upon its trunnions, and the other upon bolt I, upon which it osc'illates or partially rotates backward and forward, when desirable. I

E represents a shaft, which has its bearings in frame B, and K is a shaft, which has its bearings in frame G. Upon shaft E is secured a pulley-wheel, Emand upon shaft K is secured an emery o r grindstone, L, which has a pulley-wheeloonnected and secured to it.` Y

A belt r band, J, passes around the pulleys of these t-wo shafts, and communicates motion from the one to theother.

efe represent two arms, which project from the frame C, and in which a rod or shaft, M, has its bearings This rod is provided with a handle, O, at one end,.a crank, Q, at.the other, andis surrounded, a portion of its length, with Va coiled wire-spring, -N. A

The spring has oneof its ends connected to a. collar upon the rod or shaft, andits other made fastltoone of the arms, e. l i v A bar, P, is pivoted near one end to the upper end of a standard, R, on frame B, and is provided with a hole near its other end, into which passes the wrist of the crank Q.

'By means of the crankor shaft on rod M, the frame G is made to oscillate upon the rod I, and change its position with reference to the frame B.

In using this machine, the saw is placed at right angles to the stone, L, and said stone is raised or lowered or adjusted to suit the bevel of the saw-tooth upon which itis' operating. The edge of the stone is used for gumminrof the saw, while the bevelled side of said stone is used for sharpening the bovelled edgesof the teeth.

The machine is made stationary. The stone .is driven 'liy any suitable power, andthe frames are operated by means ofthe'h'andle O uponl shaft M. |Ihe Aweight S serves to hold the frames up and away from the saw, when the stone is not being used. A i Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent,is The rod or shaft M, provid-ed with crank Q and-spiral spring N, in combination with bar P and fram'es B and G, allconstructed'and arranged to operate as described, andl for the purposes specified.

In testimonythat I claim the foregoing, I have hereuntoset my hand and seal, this 24th day of February, 1868 AOris A. TEFFT.

Witnesses Dl S. 'MeMAs'rnRs C. RienAnnsoN. 

